They resigned, not sacked
Do you know the difference between resigning and being sacked at that level?
It's **** all except how you want to go.
Relative of mine ended a career of over 30 years in the civil service because the new conservative minister refused to talk to him.
A few months later they massively back-pedalled over the plans they pushed him out for so he was just a victim of politics.
Sure you can make it difficult but if you have enough guts to have an opinion you wouldn't try stay in a job you can't really do anymore.